Treatment method of underground water volatile organic matter pollution

Abstract

The invention provides a treatment method of underground water volatile organic matter pollution. The treatment method comprises following steps: natural zeolite powder is prepared, and is introducedinto a muffle furnace for 2h of high temperature sintering at 550 DEG C, a hexadecyltrimethylammonium bromide solution is added for mixing so as to obtain modified zeolite powder; walnut shell and calcium oxide at a mass ratio of 4:1 are introduced into a vacuum pyrolysis device, pyrolysis is carried out for 30min at 500 DEG C so as to obtain biomass charcoal; halogenated hydrocarbon polluted underground water is pumped into a sealed water tank, and is conveyed onto an adsorption filter bed, wherein the internal part of the adsorption filter bed is filled with a mixture of modified zeolite powder and biomass charcoal, and halogenated hydrocarbons in water are absorbed, and purified water is discharged into the outside; when the adsorption filter bed is saturated with halogenated hydrocarbons, the adsorption filter bed is subjected to vacuum thermal desorption processing, desorption of halogenated hydrocarbons in the modified zeolite powder and biomass charcoal is realized, and are subjected to condensation using a condenser so as to obtain liquid halogenated hydrocarbons. Processing time of the treatment method is short; the conditions are convenient to control; and high efficiencyhalogenated hydrocarbon separation is realized.

Description

Technical field: [0001] The invention relates to the technical field of groundwater pollution restoration, in particular to a treatment method for groundwater pollution caused by volatile organic compounds. technical background: [0002] In the late 1980s, organic pollution in groundwater has attracted attention. In 1999, the China Geological Survey launched the first round of groundwater organic pollution investigation, and found that, among the 43 detection indicators, a total of 36 organic substances were found in Beijing. Groundwater is a precious freshwater resource for human beings. With the continuous development of modern society's industrialization process, there have been different degrees of pollution. Groundwater pollution has gradually increased. With the rapid development of industry and agriculture in the world, the output of hazardous waste is increasing day by day, and the scope and degree of pollution are constantly expanding and intensifying. [0003] cu...

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Problems solved by technology

Compared with ectopic pumping out remediation technology, in situ remediation technology has the advantages of remediation without changing the groundwater environment, but it faces problems such as long remediation period, high operation and maintenance costs, because pollutants, soil, aquifer media The complexity of the structure and various environmental factors such as geochemistry are difficult to achieve the restoration goal; the ectopic extraction restoration technology can be roughly divided into three categories: physics, chemistry, and biology. Most of the existing technologies mainly use boiling, aeration, large Pore-negative resin adsorption, biofilm filtration, activated carbon filtration and other methods remove halogenated hydrocarbons in water, but there are problems such as low repair efficiency, incomplete removal, long treatment cycle, and high treatment cost.

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